Rotating Frames of Reference

21 thoughts on “Rotating Frames of Reference”

1. thanks for getting us through this rigorous concept. A good graspable demonstration .

2. effective rotation rate about a local vertical axis is largest at poles, and decreases to zero at the equator

3. Southern hemisphere hurricane must rotate clockwise following this discussion

4. Very helpful!
   Thank you very much

5. Hahahhaaha air rushes to the low pressure area….seems like ,we should be without air because "space" is low pressure area
   Your bucket doesnt hold the water …. and please say gravity so i can destroy your delusional believe….
   You can NOT have a high pressure area near the low pressure area without the container or hard border or membrane.

6. superb explanation!

7. Q Images on the news are not objective reality thus spinning in any direction is created through the simulation software to make the images on the television and dont reflect what is happening. Its all fake. No instruments could ever measure this data let alone turn it into an hurricane image. its the same with fake space and images. all created via artistic impersonation. Very dishonest. Typical and whos going to measure which rotation they go??? on the ground?? Your local mit will let you know. Total sophistry imported and spreading mental disorders!!!

8. wow. this is deep mk ultra. bye.

9. Could somebody explain to me why can we generalize the expression at 5:33?

10. MIT OpenCourseWare

    This video is an Unmitigated Disaster…and coming from MIT ?? God help us…

    So you're saying that hurricanes spin in opposing directions in the Northern vs Southern Hemispheres respectively, due to the Coriolis Effect ??
    I'd sure like some of the Shrooms you guys are snorting !!!

    Please Focus on: "APPARENT DEFLECTION" (i.e, "NOT REAL" ), "APPEARS" , and DOES NOT ACTUALLY in the following Citations…

    " CC.12 The Coriolis Effect :

    When set in motion, freely moving objects, including AIR [Atmosphere] and WATER masses [Clouds/Water Vapor], move in straight paths while the Earth continues to
    ROTATE INDEPENDENTLY.
    Because freely moving objects ARE NOT carried with the Earth as it Rotates , they are subject to an APPARENT DEFLECTION called the “Coriolis effect.” To an observer rotating with the Earth, freely moving objects that travel in a straight line APPEAR to travel in a curved path on the Earth."
    Segar, Douglas A; Introduction to Ocean Sciences, 2nd Edition: Critical Concept Reminders — CC.12 The Coriolis Effect (pp. 313, 314, 323, 324),
    ISBN: 978-0-393-92629-3, 2007.
    http://www.wwnorton.com/college/geo/oceansci/cc/cc12.html

    "The effect of the Coriolis Force is an APPARENT DEFLECTION of the path of an object that moves within a ROTATING COORDINATE SYSTEM. The object DOES NOT ACTUALLY deviate from its path, but IT APPEARS to do so because of the motion of THE COORDINATE SYSTEM."
    http://abyss.uoregon.edu/~js/glossary/coriolis_effect.html

    "Within its ROTATING COORDINATE SYSTEM, the object acted on by the Coriolis Effect APPEARS to DEFLECT off of its path of motion. THIS DEFLECTION IS NOT REAL . It only APPEARS to happen because the COORDINATE SYSTEM that establishes a frame of reference for the observer is also rotating."
    http://www.encyclopedia.com/earth-and-environment/atmosphere-and-weather/weather-and-climate-terms-and-concepts/coriolis-effect

    Ya See Them ^^^^^^^^^^^^^^^^^ ??
    Here comes the Punch-Line…

    What does an "ACTUAL" SPIN DIRECTION (Clockwise/Counterclockwise-hurricanes) have to do with the Coriolis Effect which is an…

    "APPARENT DEFLECTION" (i.e, "NOT REAL" ), "APPEARS" , and DOES NOT ACTUALLY .

    ?????????? Por Favor ?????????????

    Answer Key: "ABSOLUTELY NOTHING !!!!"

    In other Words (lmfao): How can Clouds "APPARENTLY DEFLECT" into an "ACTUAL" SPIN DIRECTION ?? Magic?

    This is tantamount to giving a Presentation on Quantum Numbers with Excruciating Details on s,p,d, and f orbitals (which aren't Actual Orbits, but I digress) then concluding that they are responsible for the creation of Facultative Anaerobe Woodpeckers !!!

    FFS !!!!

11. cant describe by words how amazing it is….

12. Time ic certainly independent of reference frame. A spinning cd disk
    always takes the same time for one rotation whether it is moving along
    axis of rotation or not.
    http://vixra.org/abs/1807.0027

13. This is incredible, the examples of the earth, the turntables and even the editing and camerawork are all so helpful and IMPRESSIVE. That is why MIT is known all over the world. Thank you Sanjay Sarma for this explanation

14. Iitians teaching at mit #great india

15. Best Physics explanation video was ever seen, such organised and brilliant explanation can only provide MIT

16. What the hell he does at 6:16 when pop out the arrow and the 1 circled in? Is it a kind of math trick or is it a mistake?

17. My dear professor what you  tell here is scientifically wrong. In the case of the Coriolis effect, the body makes a rotational movement together with de rotational reference frame and at the same time a radial movement in this rotational reference frame. The description of this is made in the inertial reference frame. This is the only way to get the equations you present to her. Perhaps you look again attentively this video and make your own video then new from the beginning. (https://www.youtube.com/watch?v=mcPs_OdQOYU)

18. Thank you v much sir…..

19. Very nice video, especially for prompting users to pause the video at the core concepts.

20. all you guys use to explain direction is by quoting coriolis effect. but if we are to go by your idea if we watch the wind patterns from the space it should appear perfectly straight from a high pressure zone to a low pressure zone and not curve at all since it is an 'apparent force'. what you fail to mention is that air is being dragged by the earth in counter clockwise direction in the northern hemisphere and as it moves from a high pressure zone towards the equator it is losing angular velocity in order to conserve momentum. this in turn gives a net velocity which turns it towards right. once it reaches the low pressure area. it offshoots it but gets pulled back due to pressure gradient as well as the conservation of momentum again. coriolis effect is good to explain the path when the point of reference is a person on earth but it insufficient when observer is in the space. if i am wrong please correct me

21. Thanks for this, for those paying attention at home, there is an error at 7:30 in the calculation of the acceleration vector. See https://en.wikipedia.org/wiki/Centripetal_force#Derivation_using_vectors

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